Automatic washing tunnel
Washing booths and tunnels are designed to work with water-based detergents, thus combining chemical, thermal and mechanical action, in order to guarantee excellent results and eliminate all traces of impurities or dirt.
Over the years Eurotherm has developed a series of washing systems capable of meeting the most varied needs to wash and degrease products of any shape and size.
Custom washing tunnel
Eurotherm is a leader in the production of reliable and flexible custom-made tunnels and washing systems.
Eurotherm booths and tunnels have long been recognized for their ability to create innovative solutions that are entirely custom-made to meet your specific needs.
Washing cells and multistage automatic washing tunnels
These two types of washing systems are certainly the most widely used solutions in the world of industrial washing when high production rates are required.
Eurotherm washing cells and tunnels are made of stainless steel to ensure maximum resistance to degreasing liquids and increase the longevity of the machinery.
Washing tunnels and cells are designed to perform a surface treatment of the pieces in up to 6 phases:
- 01
Phase 1: degreasing with hot phosphodegreasing solution (50/60°C)
- 02
Phase 2: first rinse with mains water
- 03
Phase 3: second rinse with mains water
- 04
Phase 4: rinsing with recirculated osmotized water
- 05
Phase 5: pure osmosis
- 06
Phase 6: nanotechnological passivation
Inside the washing booth the distribution of the jets coming from the spraying nozzles is oriented so as to hit entirely the surfaces of the pieces to be washed.
Below the washing booth there are pumps, hydraulic circuits and a pit with tanks for the recovery and reuse of washing liquids.
For each washing phase there is a dedicated accumulation tank that supplies the spraying nozzles in a continuous and automatic cycle through a reverse cascade. This solution has several advantages:
– minimization of contamination between the washes of each phase;
– optimization of the chemical products that are employed;
– no dispersion of liquid products in the sewer, with consequent reduction of environmental impact.
- 01
minimization of contamination between the washes of each phase
- 02
optimization of the chemical products that are employed
- 03
no dispersion of liquid products in the sewer, with consequent reduction of environmental impact
Multistage automatic washing cells
Our washing cells are designed to be perfectly integrated into manual painting systems.
An overhead conveyor deposits the parts to be treated in the wash cell and moves them throughout the wash cycle to ensure that the high pressure jets of the nozzles wash them perfectly.
Water that falls from the pieces being treated is collected in the tanks below and recirculated through pumps and manifolds that feed the nozzles that cover the entire surface of the inner tunnel.
Between the different spraying phases there are drainage or dripping pauses, suitable to limit the transfers between the tanks, in order to allow their own chemical properties to be maintained as long as possible.
Eurotherm multistage washing cells consist of:
- a structure made of stainless steel panels, press-bent, bolted and sealed together. This structure carries the spraying nozzles on the outside, it supports the conveyor runway on the top and is positioned above the treatment tanks.
- bottom in drainage sheets that collect and convey the liquids of each phase separately, through a self-propelled wagon, to the respective tanks.
- thick stainless steel tanks reinforced with steel profiles. For the “hot” tanks, mineral wool panels are also inserted in order to obtain greater thermal insulation.
- removable, washable and reusable metal filters to facilitate periodic maintenance.
- hatches for inspection and control of the cells.
- nozzles equipped with direct connections to the manifold of each cell through a dedicated pipe that is resistant to the chemicals that are used, connected to the supply pump.
- a hood equipped with droplet separators for the suction of the vapors formed during treatment and a centrifugal fan to convey the sucked fumes to the outside.
- an aspirator positioned outside and with the function of extracting all the vapors that are generated inside the cell during the washing cycle, which will also be used to take away also the vapors of the boiler.
In order to minimize the contamination of the different liquids sprayed during each washing phase, a number of precautions have been taken:
- 01
the spray nozzles are fixed on the outside of the cell walls, facing inwards;
- 02
all nozzle feeding pipes are dedicated exclusively to a single phase;
- 03
all the nozzle feeding piping system is positioned externally, in order to keep the inside of the washing cell as free as possible from any encumbrance that could hinder the flow of the liquid on the walls.
Single stage ecojet washing cell
Ecojet washing cells are designed for single-stage cold pre-treatment with Toran 3® without rinsing or pre-greasing.
xThis treatment guarantees excellent paint adhesion to various materials such as iron, aluminum and galvanized sheet metal. The ecojet tunnel, through low-pressure spraying (flow coating), covers the piece with a very thin film that promotes the adhesion of the coating, increasing the corrosion resistance of the coating cycle.
The system is a valid and inexpensive alternative to multi-stage phosphodegreasing if the semi-finished products to be painted are compatible with Toran 3® treatment.
Eurotherm washing tunnels
Washing tunnels are integrated into automatic painting systems and are necessary to guarantee an excellent final result starting from the initial pre-treatment
The various phases of treatment take place by passing the pieces through an automatic conveyor inside the tunnel where they are washed, using spray nozzles, from the various liquids in sequence before moving onto the next process, all without stopping.
Consequently, this is the fastest system for washing pieces but also the least flexible, since it is bound not only by the limits of the pieces’ shape but also by the coating cycle itself. Given the “in-line” nature of the system itself, it is therefore essential to develop the washing tunnel according to the goals and results that are being sought. This is where Eurotherm comes into play, not only as a system manufacturer, but above all as a strategic partner. Our technicians and engineers will be able to give you the best advice stemming from their vast experience in the field.
Our technicians and engineers will be able to give you the best advice stemming from their vast experience in the field.
Multistage immersion washing systems
This is a washing system of pieces, generally very long metal profiles, which takes place by total immersion of the pieces inside special tanks through a basket moved by a dedicated overhead crane.
In Eurotherm we design and build this kind of system in a completely customized way, according to your needs.
Eurotherm case studies
Paint plant and energy conservation: the challenge continues
FAQs about Eurotherm washing plants and booths
- modular washing booths or tunnel;
- liquid recovery system and delivery to the high pressure washer or nozzles;
- suction wall;
- electrical panel;
- system for movement of the products.
In the technical data sheets the information about the dimensions of our systems are merely indicative because in Eurotherm we mainly realize customized booths and can adapt to any space constraint. Our technical team will counsel you best from design to testing.
Mainly in the industrial sector, metal carpentry, automotive, aeronautics, railway.
Our booths and skids are compatible with most of the phosphodegreasing solutions available on the market, even the most aggressive. Our technicians will be able to counsel you best, studying the solutions that are best suited to your needs.
The average duration of the washing cycle varies depending on several factors including the size, type of dirt, or material the pieces are made of, as well as the type of treatment performed. Generally speaking, the duration of the washing cycle of a 5-phase cell can vary from 10 to 20 minutes..
As far as in-line washing tunnels are concerned, the duration is established by the passage time of the conveyor inside the tunnel itself; in general, in automatic systems, it is calculated in terms of pieces per minute.
In manual washing booths the washing times are managed by the operator who, according to their experience and on the basis of visual controls, decides autonomously when it is time to pass from degreasing to rinsing and so on.
The booth and all the components are covered by warranty as per current regulations.
We design and build wash booths and tunnels that are designed to be integrated into coating lines to ensure a complete workflow whether it is a manual or continuous line, depending on your needs.